Protecting device for gas or vapor electric lamps.



PATENTED MAR. 3,1903. M. VON REOKLINGHAUSEN. PROTECTING DEVICE FOR GAS 0R VAPOR ELECTRIC LAMPS.

APPLIOKTION FILED MAR. 28, 1902. I

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UMTED STATES PATENT OFFICE.

MAX VON RECKLINGHAUSEN, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, TO'COOPER HEWITT ELECTRIC COMPANY, A CORPORA- TION OF NEW YORK.

PROTECTING DEVICE FOR GAS OR VAPOR ELECTRIC LAMPS.

I SPECIFICATION formingpart of Letters Patent N 0. 721,741, dated March 3,1903.

Application filed March 28, 1902.

To all whom it may concern.-

Be it known that 1, MAX VON REcKLINe- HAUSEN, a subject of His. Majesty the Emperor of Germany,.and a resident of New York, in the county of New Yorkand State v of New York, have invented certain new and useful Improvements in Protecting Devices for Gas or Vapor Electric Lamps, of which .the following is a specification.

In gas or vapor electric lampssay of the well-known Cooper-Hewitt typeoue or both of the electrodes is generally of mercury, and owing to the great weight of this substance there is more or less danger of the lamps being broken or injured in being carried from place to place or in being handled without special care at any place.

The object ofthe present invention is to provide against these dangers by so constructing these lamps as to provide special pockets .for the mercury during travel, whereby the strain of the considerable weight of the mercury is to some extent relieved and in anycase is brought to bear upon other parts than those most likely to yield to such strain. I may develop the usual condensing-chamber of a Cooper Hewitt lamp into such a pocket, or I may blow out a special pocket on any part of the lamp-tube.

The accompanying drawings illustrate various arrangements for accomplishing the result aimed at, as will presently appear.

In the drawings, Figures] and 5 are sectional views ofthe same lamp in reversed positions, showing the condensing-chamber developed intoa pocket; and Figs. 2, 3, and 4 illustrate different arrangements of pockets or their equivalent. In every instance except in Fig. 1 the lamps are shown in the position which they should occupy when ready for shipment.

In Fig. 1 the condensing-chamber 4 of a Cooper Hewitt lamp is developed-into a pocket, at the bottom of which, when the lamp is prepared for shipment, the mercury 5 is located.' This particular lamp is designed to Serial No. 100,368. (No model.)

have two mercury electrodesone connected with the leading-in Wire 7 and the other connected with the leading-in wire 8. When op.-

erated, thelamp will be in the position shown in Fig. 1, the mercury finding its way first into the pocket which the leading-in wire 7 enters, and the overflow passing then to the pocket at the opposite end of the lamp and there forming the second or negative electrode. Fig. 2 again showsthe chamber 4 developed into a pocket for holding the mercury 5, the shipping position of the lamp being such that the main tube of the lamp lies horizontal.

In Figs. 3 and 4 are shown special pockets 10 1O, blown on diderent parts of the lamp- .body and adapted to contain the'mercury,

which can at will be distributed from the pockets to the proper parts of. the lamp to form the electrodes.

The condensing-chambers of Cooper Hewitt lamps have generally been constructed with the leading-in wire entering at the ex tremity thereof. This has caused a contraction of the chamber at that point, and it is these contracted portions that are particularly Weak and unable to resist the weight or shock of the mercury. The chamber illustrated in Fig. 5 is rounded out at the end to obviate this weakness. In this sense I regard the chamber therein illustrated as a speciallyconstructed pocket in the same way as the pockets illustrated in Figs. 2, 3, and 4.

What I claim as my invention is In a gas or vapor electric lamp, the combi- 

